4. Steven Spielberg – Film director, producer, screenwriter, and business magnate. He is considered one of the most popular and influential filmmakers in the history of cinema.

He dropped out of junior high school. He came back to school and was placed in a learning-disabled class but couldn't last more than a month. He then dropped out of school forever.

Reuters in the News Search of YahooSteven Spielberg at the 2013 Cannes Film Festival

5. Oprah Winfrey – Host of a multi-award-winning talk show and one of the the most influential women in the world.

She was once a TV reporter but got fired because she was considered as unfit for TV.

(Photo: Reuters / John Gress)Oprah Winfrey gestures during the taping of "Oprah's Surprise Spectacular" in Chicago May 17, 2011. Winfrey kicked off one of her last-ever national talk shows on Tuesday with hugs from Tom Hanks, Tom Cruise and Madonna in a packed Chicago arena.

6. Elvis Presley – "The King" was considered one of the most significant cultural icons of the 20th century.

When he sang at the Grand Ole Opry, the oldest continuous radio program in the United States, in 1954, he was told to stick to his day job of driving trucks.

(Photo: Reuters/Handout)Elvis Presley is pictured in his United States Army uniform in this undated publicity photograph.